QtLocation: Nokia plugin now returns an error on invalid travel modes

The plugin now returns an error if more than one travel mode flag
is set at the same time.

Change-Id: Iee8254c53c599b0e79ff701dc4e000ba4659a400
Reviewed-by: Alex Wilson <alex.wilson@nokia.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/plugins/geoservices/nokia/qgeoroutingmanagerengine_nokia.cpp b/src/plugins/geoservices/nokia/qgeoroutingmanagerengine_nokia.cpp
index b509c748..bc6e8234 100644
--- a/src/plugins/geoservices/nokia/qgeoroutingmanagerengine_nokia.cpp
+++ b/src/plugins/geoservices/nokia/qgeoroutingmanagerengine_nokia.cpp
@@ -223,6 +223,16 @@ bool QGeoRoutingManagerEngineNokia::checkEngineSupport(const QGeoRouteRequest &r
     if ((travelModes & supportedTravelModes()) != travelModes)
         return false;
 
+    // Count the number of set bits (= number of travel modes) (popcount)
+    int count = 0;
+
+    for (unsigned bits = travelModes; bits; bits >>= 1)
+        count += (bits & 1);
+
+    // We only allow one travel mode at a time
+    if (count != 1)
+        return false;
+
     return true;
 }